body{
    background: url(大作业.jpg) no-repeat;
}
.menu3{
    position: relative;
    width: 1000px;
    height: 40px;
}
.menu3 li{
    list-style-type: none;
    float: left;
    width: 120px;
    height: 40px;
    line-height: 40px;
    text-align: center;
}
.menu3 a{
    text-decoration: none;
    display: block;
    color: rgb(165, 117, 117);
    /* border-right: 1px solid #ccc ; */
    border-bottom: 1px solid #808080 ;
    height: 39px;
    width: 120px;
    z-index: 100;
}
.menu3 a:hover{
    background-color:aliceblue;
    border-bottom: 1px solid #ffff00;
}
.menu3 .submenu{
    visibility: hidden;
    width: 120px;
}
.menu3 li:hover .submenu{
    visibility: visible;
    position: absolute;
    z-index: 100;
}
.menu3 .submenu li{
    height: 35px;
    line-height: 35px;
}
.menu3 .submenu a{
    background-color: #666;
    color: #ffff;
    border: 0;
}
.menu3 .submenu a:hover{
    background-color: #333;
}
/* .slick-list ul img {
    position: absolute;
    top: 0;
    width: 100%;
    height: 100%;
    float: left;
} */
/* .form_demo{
    font-size: 1.4rem;
    border: 1px solid seagreen;
    background: #fff;
    width: 35rem;
    height: 20rem;
}
.form_demo input[type="text"],.form_demo input[type="password"]{
    height: 39px;
    border-left: 0;
    border-right: 0;
    border-top: 0;
    width: 200px;
    padding-left: 48px;
    border: 1px solid #000000;
    text-align : center;
}
.form_demo #username{
    background: #fff url(zfb.png) no-repeat top left;
    height: 39px;
    border: 1px solid #000000;
}
.form_demo #pwd{
    background: #fff url(zb.png) no-repeat top left;
    height: 39px;
    border: 1px solid #000000;
}
.form_demo [type="submit"]{
    width: 100px;
    height: 38px;
    background-color: rgb(221, 81, 81);
    border: 1px dashed #2c82d3;
    border-radius: 10px;
    color: #fff;
    letter-spacing: 10px;
    text-align: center;
}
     */
     /* .menu3 .li {
        left: 15px;
         border: 0px;
        padding: 0px;
        font-size: 100%;
        margin: 0px;
        font-family: inherit;
        -webkit-font-smoothing: subpixel-antialiased;
        -webkit-text-size-adjust: 100%;
        font-weight: normal;
        word-break: break-word;
     } */
     .stack li img{
         
         border: 0;
        right: 10px;
         
     }
     .menu1{
        width: 150px;
        height: 160px;
        
    }
    .menu1 li{
        list-style-type: none;
        width: 120px;
        height: 39px;
        background-color: brown;
        border-bottom: 1px solid rgba(212, 124, 73, 0.836);
    }
    .menu1 a{
        text-decoration: none;
        display: block;
        width: 102px;
        height: 39px;
        padding-left: 12px; ;
        color: white;
        border-left: 10px solid rgba(212, 124, 73, 0.836);
    }
    .menu1 a:hover{
        background-color: rgb(189, 157, 69);
        border-left: 10px solid rgba(65, 160, 139, 0.836);
    }
    .st img{
        top: 170px;
        left: 175px;
        z-index: 99;
        background: #b6d9f3;
        margin: 0 auto;
        position: absolute;
        text-align: center;
    }
    #left {
        width: 350px;
        height: 370px;
        margin: 0px;
        padding: 0px 0px 5px 0px;
        top: 0;
        color: #181cff;
        float: right;
    }
    
    #weather {
        background: url("images/index.png") no-repeat;
        margin: 0px 5px 0px 5px;
    }
    
    #weather h3 {
        font-size: 24px;
        padding: 24px 0px 0px 74px;
        margin: 0px;
    }
    
    #weather ul {
        list-style-type: none;
        margin: 8px 5px 0px 5px;
        padding: 10px 0px 8px 5px;
    }
    
    #weather ul li {
        padding: 1px 0px 0px 1px;
    }